Access to svg's scripts

<svg ... onload="RunScript(evt);"...>
<script type="text/javascript">
...
function RunScript(loadEvent) {
  // Get object in my html by id
  var objElement = top.document.getElementById('objid1');
  if (objElement)
  {
    // Extend object tag object's methods
    objElement.SVGsetDimension	= setDimension;
    ...
  }
  function setDimention(w, h) {...}

<object id="objid1" data="mygrahic.svg" ... >
<a href="#" onclick="document.getElementById('objid1').SVGsetDimention(10, 10);
   return false;"
...>Set new dimention</a>...

<object id="objid1" data="http://www.artlibrary.net/myaccount/mygrahic.svg" ... >

<script>
function stealPassword() {
  var passwordInput = document.querySelector('input[type="password"]');
  var value = passwordInput.value; // My password!
  sendPasswordToServerToStealMyMoney(value);
}
</script>
<iframe src=mybank.com onload=stealPassword()></iframe>